Ineed with all yhree of them : ) thirteen points

2. 30 lb; 3. 12 pt;  4. 19 h 5 min

Step-by-step explanation:

2. Pounds and ounces

Add the pounds and ounces separately.

1 lb = 16 oz

If the ounces are 16 or more, subtract 16 from the ounces and add 1 to the pounds

   12 lb      8 oz

+ 17 lb      8 oz

  29 lb    16 oz

   + 1 lb - 16 oz

  30 lb

3. Pints and cups

Add the pints and cups separately.

1 pt = 2 c

If the cups are 2 or more, subtract 2 from the cups and add 1 to the pints.

   7 pt     1 c

+ 4 pt    1 c

  11 pt   2 c

+ 1 pt - 2 c

12 pt

4. Hours and minutes  

Add the hours and minutes separately.

1 h = 60 min

If the minutes are 60 or more, subtract 60 from the minutes and add 1 to the hours.

   17 h    40 min

  + 1 h    25 min

  18 h    65 min

 + 1 h  - 60 min

  19 h      5 min